package com.sky.mapper;

import com.sky.entity.ShoppingCart;
import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.Update;

import java.util.List;

@Mapper
public interface ShoppingCartMapper {
    /**
     *  根据用户id查询购物车
     * @param shoppingCart
     * @return
     */
    ShoppingCart get(ShoppingCart shoppingCart);

    /**
     *  更新购物车
     * @param shoppingCart
     */
    @Update("update shopping_cart set number = #{number} where id = #{id}")
    void update(ShoppingCart shoppingCart);

    /**
     *  添加购物车
     * @param shoppingCart
     */
    void insert(ShoppingCart shoppingCart);

    /**
     *  根据用户id查询购物车
     * @param userId
     * @return
     */
    @Select("select * from shopping_cart where user_id = #{userId}")
    List<ShoppingCart> getAll(Long userId);

    /**
     *  清空购物车
     * @param userId
     */
    @Delete("delete from shopping_cart where user_id = #{userId}")
    void cleanAll(Long userId);

    /**
     *  删除购物车中的一个商品
     * @param id
     */
    @Delete("delete from shopping_cart where id = #{id}")
    void deleteById(Long id);
}
